12022111987 has 4 divisors (see below), whose sum is σ = 12023924040. Its totient is φ = 12020299936.

The previous prime is 12022111979. The next prime is 12022112017. The reversal of 12022111987 is 78911122021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12022111987 - 2³ = 12022111979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12022111967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896038 + ... + 909355.

It is an arithmetic number, because the mean of its divisors is an integer number (3005981010).

Almost surely, 2^12022111987 is an apocalyptic number.

12022111987 is a deficient number, since it is larger than the sum of its proper divisors (1812053).

12022111987 is an equidigital number, since it uses as much as digits as its factorization.

12022111987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812052.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 12022111987 in words is "twelve billion, twenty-two million, one hundred eleven thousand, nine hundred eighty-seven".